|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Non-equilibrium Features of Grain Boundaries
||The Influence of 3-D Structure on the Mechanical Behavior of Layered Nanocomposites
||Nathan Mara, Youxing Chen, Nan Li, Jon Kevin Baldwin, Ben Liu, Richard Hoagland
|On-Site Speaker (Planned)
2-dimensional (2D) sharp interfaces with distinct boundaries demarcating an abrupt discontinuity in material properties in nanolayered composites have been studied for almost twenty years and are responsible for enhanced behaviors such as strength, radiation damage, and deformability. However, 2-D interfaces have their limitations with respect to deformability and toughness. 3D interfaces are defined as heterophase interfaces that extend out of plane into the two crystals on either side and are chemically, crystallographically, and/or topologically divergent, in three dimensions, from both crystals they join. Micropillar compression results show that the strength of Cu/Nb nanocomposites containing 3D interfaces is significantly greater than those containing 2D interfaces. Shear banding in 3D Cu/Nb is observed during pillar compression with retention of continuous layers across the shear band. We will present our recent results on deformation of such 3-D interfaces, and describe this evolution mechanistically through the use of atomistic simulations.
||Planned: Supplemental Proceedings volume